Packing stabber



May 10, 1932.

H. W. DE JARNETTE PACKING STABBER Filed July 21, 1930 Patented May 10, 1932 UNITED STATES PATENT; OFFICE HENRY w. DE J'ARINETTE; or DES MOINES, IOWA, ASSIG-NOR or ONE-EAL! 'ro Jorm c;

' HOL, or nns MOINES, IOWA PACKING STABBER Application filed July 21,

5 stabber for the use of printers which can be adjusted for stabbing packing to any desired depth without the danger of stabbing'clear throughthe packing and into the printing cylinder.

Still a further object is to provide a packing stabber consisting of an L-shaped chisel having a shoulder with a stop blockadjustably mounted in the channel thereof and having a set screw contacting with the shoulder 15 and a gauge and protector block slidably mounted in the channel of the chisel and guidingly associated with the stop block'by.

-means of aguide pin.

A further ob'ect 1s toprovide adspring 7 2 for moving the gauge and protector block to position for protecting the point of the "chisel and a limiting means for the gauge andprotector block.

, 'With theseand other objects in view my templated are attained, as hereinafter more fully set forth, pointed out in my claims, and

illustrated in the accompanying drawings, in which: v

Figure 1 is a perspective view of apacking I v andis slidably mountedthrough an'opening stabber embodying my invention.

Figure 2 is a perspective vlewof the opposite side of the same. 1

Figure 3 is an enlarged sectional view on the line 3-3 of Figurev2. c

Figure 4 is a perspective view of a portion of a printing press showing packing sheets been made by my packing stabber.

Figure 5 is a diagrammtiqsectional view showing partsof the lower portion of the packing stabber in stabbing and gauging position; i

Figure 6 1s a perspective view illustrating the alignment of packing sheets which have been stabbed with the packing stabbe'r; and

invention: consists in the construction, 'arrangement and combination of the varlous parts of my device, whereby the objects conon the printing cylinder and stabber marks on the packing sheets, such marks having 26 until it engages the stop block 18.

1930. Serial No. 469,369.

Figure? is a sectional view on the line 7-7 of Figure 3. 7

On the accompanying drawings I have used the reference character A to indicate generally a chisel. The chisel A has a pair of flanges 10, each of which has a sharpened point 12. The points 12 when used for stabb ng purposes make an L-shaped cut with the corner thereof cut away due to a slot 14 formed in'the chisel A. Ashoulder 16is formed in the chiselA and serves asa head to strike against with a 'hammer or thelike when using the. stabben o v A stop block 18 is secured in the channel of the L-shaped chisel A by a slot and screw connection indicated at 20 and 22 respectively. Thus it will be seen that the stop block 18 can be longitudinally adjusted relative to the chisel A when the screw 22 is loosened and the screw can be tightened for.

retaining such adjustment.

A set screw 24: V provided to act as a thrust member between the stop block 18 and A the shoulder 16. When it, is desired to adjust the stop block 18 the screw 22 is loosene'djand the screw24 adjusted as desired, whereupon the screw 22 may be retightened. V

Slidably associated with the chisel A is a gauge and protector block 26 which is guidingly associated with the stop block 18 by means f a guide pin 28. Th guide M1128 secured. to the gauge and protector'block 26 30 formedin the stop block 18. A spring 32 is interposed between the blocks 18 and26 for normallyholding them apart. To limit the outward movement'of the block 26 relative tothe block 18, I provide a limit pin 84:

which projects into an enlarged opening 36 in theistop block 18. The enlargediopening may be a slot if desired and' allows limited outward opening movement of the gauge and protector block. 26, butis large enough to allow inward sliding movement of the block print an impression on 'asheet of the stock to be printed in order to determine whether or not each individual part of the type 40 on the bed plate 42 in Figure 4 prints with the correct pressure, or whether it prints too lightly or too heavily. The printing is done by recip'ro'c'atingthe bed plate 42 and simultaneously revolving a cylinder 44, the stock being carried on the cylinder between it and the type 40. Y

The cylinder 44 isprovided with packing 46 over which a sheet of manila paper 48 is usually stretched by means of anchoring one end thereof under a'clampbar 50 and wind-' packing 46 and one thickness outside of the manila paper. The thickness outside is indicated by the reference character B. It represents a sheetof the stock to be printed and is fed into the press the same as the stock would be in printing operations. Its leading edge is held'by fingers 56 mounted on a shaft V I the packm'g'sheetwhen building it'upor cut- 58 which'is automaticallyoperated for releasing and engaging successive sheets of stock while the press is in operation. I

, After the sheet of stock 54-indicated' at B is printed and just before the fingers 56 are released, the cylinder 44 is stoppedfand the impression made on the sheet B by the print 40 examined to determine whether all parts of the impression are perfect. If not, the packing stabber is used to make the marks indicated at 60 which are madethrough the sheet B, the manila sheet 48 and the sheets 54 thereunder as shown,-for instance, in Fig- 'ure 5. The gauge block 26 prevents the chisel point 12, from going any deeper than desired. f I I r j a The cylinder 44'is thenrotated a slight distance which releases the fingers 56 and the sheet B may be removed from the cylinder .44 and the light spots backedup by pasting tissue or heavier pieces of paper where needed or where the type has printed heavily, parts of the sheet Bmay be cut out. The sheet B (which is generally called a spot sheet) is then replaced on the cylinder 44 in place of one of thesheets 54 under themanila sheet 48. His evident that it must occupy the same 7 position on the surface of the cylinder and -th'at iswhy-the stabber has been usedto make a mark through the manilapaper 48 and the sheets 54 thereunder.

54 is left outand replaced'bythe sheet B.

Another sheet of stock paper "54 is then when compared with the impression on the .One ,of these sheets sheet B. If the impression is perfect the printing operations are started and if imperfect the cut-out and backing operations may be performed on this sheet, the same as on the sheet B and it is sometimes necessary to pull two or three impressions on the spot sheets before the correct impression is had.

As shown in Figure 6, the corner of the sheet B is torn away after the mark 60 has been made (the originalsh ape of the corner being shown in dotted lines) so as to aid in aligning the marks 60 of one sheet with those of another. It is desirable that a packing stabber of thekind'herein shown be adjustable so as to accommodate different thicknesses of stock, different types of presses, etc.

If it is desired for the chisel point 12 to go through more or less sl1eet's,the stop block 18can be adjusted accordingly.

It will be obvious, of course, that the cutting away operation could not be performed while the packing sheets were on the cylinder as the printer could not cut throughonly the desired number of sheets without cutting 7 through those below, which wouldbe u'nde 'sirable. It 'is further obvious that it"is desirable to build up on the-backbf the'pa'cking sheet rather than on the outside-thereof. This explains why it is desirable to remove his fingers "cut on the chisel points when. thrusting his hand into his pocket. 'Thus' the block 26 serves very 'e'fiective'ly the double purpose of gauge and a protector.

Some changes may be made in the construction'and arrangement of theparts ofiny device without departing from 'the'realspirit and purpose of my invention, and it is "my intention to cover by any claims, any modified forms of structure or use of me'chani'cal equivalents, which may be reasonably includ ed within their scope.

I'claim-asmy invention; 7 a 1. In a packing stabber,ian 'L-"shaped chisel,

anda depth-gauge'and protector for the-point thereof comprising "a protector member, a stop therefor, spring'means-tohol'd said mem ber away from said stop and in position for protecting said chiselpointand limit means to limit the movement of said protector member away from-said stop, saidstop having a slot and screw connection withsaid chisel, a shoulder on said chisel and a set screw in said stop and engaging said shoulder.

'2. Ina packing stabberfan -L-shapedchisel,

a stop 'block in'the channel thereof, a slot and,

screw connection between said chisel and said stop block, a protector block slidable in said channel from a position protecting the point of said chisel to engagement with said stop block and a spring for constraining said protector block to protecting position.

3. In a packing stabber, a chisel member and a depth gauge and protector for the point thereof, a stop member for said protector,

spring means to hold said protector away from said stop member and in position for protecting said chisel point, limit means to limit the'movement of said protector away from said stop member, said stop member having a slot and screw connection with said chisel member, a shoulder on one of said members and a set screw in the other one and engaging said shoulder.

4. In a packing stabber, a chisel member and a depth gauge and protector for the point thereof, a stop member for said protector, spring means to hold said protector away from said stop member and in position for protecting said chisel point, limit means to limit the movement of said protector away from said stop member, a shoulder on one of said members and a set screw in the other one and engaging said shoulder.

HENRY W. DE JARNETTE. 

